METHOD FOR PRODUCING LIQUID CRYSTAL-DISPERSED TYPE WATER-SOLUBLE POLYMER SOLUTION, METHOD FOR PRODUCING LIQUID CRYSTAL-DISPERSED TYPE WATER-SOLUBLE POLYMER COMPOSITE FILM, LIQUID CRYSTAL-DISPERSED TYPE WATER-SOLUBLE POLYMER COMPOSITE FILM, POLARIZER, POLARIZING PLATE, OPTICAL FILM AND IMAGE DISPLAY DEVICE

• Main Author: FUTAMURA KAZUNORI
• Format: Patent
• Language: English
• Published: 23.03.2006
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

PROBLEM TO BE SOLVED: To provide a method for producing by a relatively simple method a liquid crystal-dispersed type water-soluble polymer solution wherein fine regions containing a liquid-crystalline birefringent material are dispersed in the water-soluble polymer solution in small particle diameters. SOLUTION: This method for producing the liquid crystal-dispersed type water-soluble polymer solution wherein fine regions formed from a liquid-crystalline birefringent material are dispersed in the water-soluble polymer solution in a prescribed concentration is characterized by comprising (1) process for preparing a mixture solution of the liquid-crystalline birefringent material with the water-soluble polymer solution so that the concentration of the liquid-crystalline birefringent material is higher than the above-mentioned prescribed concentration, (2) a process for subjecting the above-mentioned mixture solution to a high shear stirring so that the liquid-crystalline birefringent material is dispersed in fine regions having maximum particle diameters of ≥6 μm, (3) a process for mixing and diluting the fine region-dispersed water-soluble polymer solution with the water-soluble polymer solution so that the fine regions become the above-mentioned described concentration, and (4) a process for uniformly stirring and dispersing the fine regions in the diluted water-soluble polymer solution. COPYRIGHT: (C)2006,JPO&NCIPI